Fountain-pen



B. S. PASCHALL.

FOUNTAIN PEN.

APPLICATION FILED APR. 2. 1919.

1 327,729 Patented J an. 13, 1920.

'fw iw UNITED STATES PATENT OFFICE.

BENJAMIN S. PASGHALL, OF NEW YORK, N. Y.

' FOUNTAIN-PEN.

To all whom it may concern:

Be it known that I, BENJAMIN S. Pnsouxnn, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Fountain-Pens, of which the following is a specification.

My invention relates particularly to an improvement in fountain pens, and which is applicable to fountain pens of different types.

The object of my invention is to provide a fountain pen which will not flood. In the fountain pen of the ordinary type when the fountain pen is inverted, and the user begins to write with the same, the heat of the hand expands the air above the level of the liquid in the fountain pen and causes from one to three drops of ink to be expelled by the force of the expanded air, thus ofttimes producing a blot upon the paper. It is the object of my invention to avoid the flooding or leaking of fountain pensin this manner. Further objects of my invention will appear from the detailed description thereof contained hereinafter.

\Vhile my invention is capable of embodiment in many different forms, for the purpose of illustration I have shown only one form of my invention in the accompanying drawings, in which:

The figure is a vertical section of a fountain pen made in accordance with my invention.

In the drawings, I have shown a fountain pen barrel 1 having an ink-holding chamber 2, said barrel being screw-threaded to receive a screw-threaded closure 3 carrying a pen 4 in a central passageway 5 passing through the same. The pen -i is held in place by a channel feeding member 6 which fits beneath the pen 4:. In the rear of the passageway 5, there fits one end of a coiled capillary tube 7 having an enlarged chamber 8 therein. This capillary tube may have any number of turns or coils, but it should preferably have a capacity in excess of three drops of the ink.

In the operation of my invention, assuming that the fountain pen has previously been used for writing, but is not now being used, but is supported in a vertical position with the pen at the top of the barrel 1, there will be a body of air in the chamber 2 immediately above the body of ink, and below Specification of Letters Patent. Patented J an, 13 1920,

Application filed April 2. 1919.

Serial No. 286,912.

the closure 3. At the-same time there ordinarily will be in the coiled capillary tube 7 below the chamber 8 a small quantity of ink retained in the capillary tube 7 since the time when the pen was previously used for writing. The barrel 1 together with its contents will have the temperature of the sur rounding air. lVhen now the pen is inverted for writing it is grasped in the usual manner by the hand, and the ink in the barrel 1 will be conveyed forwardly to the pen 4: in the usual manner, and gravity alone will not, any more than in the usual type of fountain pen, cause the liquid to flow from the end of the pen 4 any faster than it is used. The influence from the heat of the hand causes the body of air which is now moved to the other end of the barrel 1 to expand, thus immediately forcing downwardly an additional quantity of ink over that which will be carried forward by gravity, amounting to from one to three drops. This quantity of ink, however, does not flow from the end of the pen 4, inasmuch as the capacity of the coiled capillary tube 7 is such as to provide ample room to receive the same. In this way, the expansion of the air in the barrel 1 merely has the effect of causing the inkv to reach the pen 4 without flooding or leaking from the end of the same. \Vhen the user has finished writing with the pen, and it is restored to its upright position, as shown in Fig. 1, the body of air in the barrel 1 becomes cooled to the temperature of the surrounding air, and contracts correspondingly so as to withdraw from one to three drops of the ink in the capillary tube 7, but leaving ordinarily a small quantity of ink in the inner end of said coil. In case at any time the amount ofair in the barrel 1 becomes rarefied, owing to the rapid withdrawal of the ink from the pen, the normal condition will be restored by a quantity of air passing into the barrel 1 through the capillary tube 7.

While I have described my invention above in detail, I wish it to be understood that many changes may be made therein without departing from the spirit thereof.

I claim: 1

1. In combination, a fountain pen, and means for retaining in the pen ink fed by the expansion of a gaseous body within the pen, comprising areversely bent tube having an enlarged chamber therein.

2.- In combination, a fountain pen, and

means for retaining in the pen ink fed by the expansion of a gaseous body ithin the pen, comprising a reversely bent capillary tube having an enlarged chamber therein.

3. In combination, a fountain pen, and means for retaining in the pen ink fed by the expansion of a gaseous body Within the pen, comprising a'coiled capillary tube having an enlarged chamber therein.

4. In combination, a fountain pen, and means for retaining in the pen ink fed by the expansion ofa gaseous body Within the pen, comprising a coiled tube, said tube having a capacity of at deast three drops.

5. In combination, a fountain pen, and

means for'retaining inthe pen ink fed by the expansion of a gaseous body within the pen, comprising a coiled capillary tube, said tube having a capacity of at least three drops.

6. In combination, a fountain en, and means for retaining in the pen in: fed by the expansion of a gaseous body Within the pen, comprising a coiled capillary tube having an enlarged chamber therein, said tube having a capacity of at least three drops.

In testimony that I claim the foregoing, I havehereunto set my hand this 14th day of March, 1919.

BENJAMIN S. PASCHALL. 

